Is there a way to change the status light color on the Blackberry from blinking red to bliking green without the use of a 3rd party program?

Nope, not at this time.

how about a way just to turn off the status light? What does the blinking green light when holstered mean? and the amber one?

thanks

Green means that you are on the network. Go into Settings / Options / Screen and keyoard and set the Network Notification option (whatever it is called) to Off.

Is this green light only for the 7100 series, I do not even have an option called settings in my 7250.

Yes.

Amber means that your battery is low.